Law of Universal Gravitation
Gravity has consequences whether or not we approve of them. A fall is not a moral verdict; it is what happens under certain conditions.
Integrity can be considered through consequences too, though it is not a physical law. When we fail to honor our word, an agreement may stop working and trust may become harder to extend. The cost can be less immediate than a fall, but it still reaches the people who relied on what we said.
The analogy helps if it moves us away from calling people good or bad and toward asking what makes a commitment workable. It fails if we pretend every broken promise produces the same result or that trust follows automatically from one kept word.
Honoring our word gives others more reason to rely on us. When we cannot keep it, acknowledging and addressing the gap is part of the same work.